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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/globals.h" | 5 #include "vm/globals.h" |
6 #if defined(TARGET_OS_LINUX) | 6 #if defined(TARGET_OS_LINUX) |
7 | 7 |
8 #include "vm/os.h" | 8 #include "vm/os.h" |
9 | 9 |
10 #include <errno.h> // NOLINT | 10 #include <errno.h> // NOLINT |
11 #include <limits.h> // NOLINT | 11 #include <limits.h> // NOLINT |
12 #include <malloc.h> // NOLINT | 12 #include <malloc.h> // NOLINT |
13 #include <time.h> // NOLINT | 13 #include <time.h> // NOLINT |
14 #include <sys/resource.h> // NOLINT | 14 #include <sys/resource.h> // NOLINT |
15 #include <sys/time.h> // NOLINT | 15 #include <sys/time.h> // NOLINT |
16 #include <sys/types.h> // NOLINT | 16 #include <sys/types.h> // NOLINT |
| 17 #include <sys/syscall.h> // NOLINT |
| 18 #include <sys/stat.h> // NOLINT |
| 19 #include <fcntl.h> // NOLINT |
17 #include <unistd.h> // NOLINT | 20 #include <unistd.h> // NOLINT |
18 | 21 |
19 #include "platform/utils.h" | 22 #include "platform/utils.h" |
20 #include "vm/code_observers.h" | 23 #include "vm/code_observers.h" |
21 #include "vm/dart.h" | 24 #include "vm/dart.h" |
22 #include "vm/debuginfo.h" | 25 #include "vm/debuginfo.h" |
23 #include "vm/isolate.h" | 26 #include "vm/isolate.h" |
| 27 #include "vm/thread.h" |
24 #include "vm/vtune.h" | 28 #include "vm/vtune.h" |
25 #include "vm/zone.h" | 29 #include "vm/zone.h" |
26 | 30 |
27 | 31 |
28 namespace dart { | 32 namespace dart { |
29 | 33 |
30 // Linux CodeObservers. | 34 // Linux CodeObservers. |
31 | 35 |
32 DEFINE_FLAG(bool, generate_gdb_symbols, false, | 36 DEFINE_FLAG(bool, generate_gdb_symbols, false, |
33 "Generate symbols of generated dart functions for debugging with GDB"); | 37 "Generate symbols of generated dart functions for debugging with GDB"); |
34 DEFINE_FLAG(bool, generate_perf_events_symbols, false, | 38 DEFINE_FLAG(bool, generate_perf_events_symbols, false, |
35 "Generate events symbols for profiling with perf"); | 39 "Generate events symbols for profiling with perf"); |
36 DEFINE_FLAG(bool, ll_prof, false, | 40 DEFINE_FLAG(bool, ll_prof, false, |
37 "Generate compiled code log file for processing with ll_prof.py."); | 41 "Generate compiled code log file for processing with ll_prof.py."); |
38 DEFINE_FLAG(charp, generate_pprof_symbols, NULL, | 42 DEFINE_FLAG(charp, generate_pprof_symbols, NULL, |
39 "Writes pprof events symbols to the provided file"); | 43 "Writes pprof events symbols to the provided file"); |
| 44 DEFINE_FLAG(bool, generate_perf_jitdump, true, |
| 45 "Writes jitdump data for profiling with perf annotate"); |
40 | 46 |
41 class LowLevelProfileCodeObserver : public CodeObserver { | 47 class LowLevelProfileCodeObserver : public CodeObserver { |
42 public: | 48 public: |
43 LowLevelProfileCodeObserver() { | 49 LowLevelProfileCodeObserver() { |
44 Dart_FileOpenCallback file_open = Isolate::file_open_callback(); | 50 Dart_FileOpenCallback file_open = Isolate::file_open_callback(); |
45 if (file_open == NULL) { | 51 if (file_open == NULL) { |
46 return; | 52 return; |
47 } | 53 } |
48 const char* filename = "v8.log.ll"; | 54 const char* filename = "v8.log.ll"; |
49 log_file_ = (*file_open)(filename, true); | 55 log_file_ = (*file_open)(filename, true); |
50 #if defined(TARGET_ARCH_IA32) | 56 #if defined(TARGET_ARCH_IA32) |
51 const char arch[] = "ia32"; | 57 const char arch[] = "ia32"; |
52 #elif defined(TARGET_ARCH_X64) | 58 #elif defined(TARGET_ARCH_X64) |
53 const char arch[] = "x64"; | 59 const char arch[] = "x64"; |
54 #elif defined(TARGET_ARCH_ARM) | 60 #elif defined(TARGET_ARCH_ARM) |
55 const char arch[] = "arm"; | 61 const char arch[] = "arm"; |
56 #elif defined(TARGET_ARCH_MIPS) | 62 #elif defined(TARGET_ARCH_MIPS) |
57 const char arch[] = "mips"; | 63 const char arch[] = "mips"; |
58 #else | 64 #else |
59 const char arch[] = "unknown"; | 65 #error Unknown architecture. |
60 #endif | 66 #endif |
61 LowLevelLogWriteBytes(arch, sizeof(arch)); | 67 LowLevelLogWriteBytes(arch, sizeof(arch)); |
62 } | 68 } |
63 | 69 |
64 ~LowLevelProfileCodeObserver() { | 70 ~LowLevelProfileCodeObserver() { |
65 Dart_FileCloseCallback file_close = Isolate::file_close_callback(); | 71 Dart_FileCloseCallback file_close = Isolate::file_close_callback(); |
66 if (file_close == NULL) { | 72 if (file_close == NULL) { |
67 return; | 73 return; |
68 } | 74 } |
69 ASSERT(log_file_ != NULL); | 75 ASSERT(log_file_ != NULL); |
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103 const char* marker = optimized ? "*" : ""; | 109 const char* marker = optimized ? "*" : ""; |
104 char* name_buffer = | 110 char* name_buffer = |
105 Isolate::Current()->current_zone()->PrintToString("%s%s", marker, name); | 111 Isolate::Current()->current_zone()->PrintToString("%s%s", marker, name); |
106 intptr_t len = strlen(name_buffer); | 112 intptr_t len = strlen(name_buffer); |
107 | 113 |
108 LowLevelCodeCreateStruct event; | 114 LowLevelCodeCreateStruct event; |
109 event.name_size = len; | 115 event.name_size = len; |
110 event.code_address = base; | 116 event.code_address = base; |
111 event.code_size = size; | 117 event.code_size = size; |
112 | 118 |
113 LowLevelLogWriteStruct(event); | 119 { |
114 LowLevelLogWriteBytes(name_buffer, len); | 120 MutexLocker ml(CodeObservers::mutex()); |
115 LowLevelLogWriteBytes(reinterpret_cast<char*>(base), size); | 121 LowLevelLogWriteStruct(event); |
| 122 LowLevelLogWriteBytes(name_buffer, len); |
| 123 LowLevelLogWriteBytes(reinterpret_cast<char*>(base), size); |
| 124 } |
116 } | 125 } |
117 | 126 |
118 private: | 127 private: |
119 void* log_file_; | 128 void* log_file_; |
120 | 129 |
121 DISALLOW_COPY_AND_ASSIGN(LowLevelProfileCodeObserver); | 130 DISALLOW_COPY_AND_ASSIGN(LowLevelProfileCodeObserver); |
122 }; | 131 }; |
123 | 132 |
124 | 133 |
125 class PerfCodeObserver : public CodeObserver { | 134 class PerfCodeObserver : public CodeObserver { |
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157 uword size, | 166 uword size, |
158 bool optimized) { | 167 bool optimized) { |
159 Dart_FileWriteCallback file_write = Isolate::file_write_callback(); | 168 Dart_FileWriteCallback file_write = Isolate::file_write_callback(); |
160 ASSERT(file_write != NULL); | 169 ASSERT(file_write != NULL); |
161 const char* format = "%" Px " %" Px " %s%s\n"; | 170 const char* format = "%" Px " %" Px " %s%s\n"; |
162 const char* marker = optimized ? "*" : ""; | 171 const char* marker = optimized ? "*" : ""; |
163 intptr_t len = OS::SNPrint(NULL, 0, format, base, size, marker, name); | 172 intptr_t len = OS::SNPrint(NULL, 0, format, base, size, marker, name); |
164 char* buffer = Isolate::Current()->current_zone()->Alloc<char>(len + 1); | 173 char* buffer = Isolate::Current()->current_zone()->Alloc<char>(len + 1); |
165 OS::SNPrint(buffer, len + 1, format, base, size, marker, name); | 174 OS::SNPrint(buffer, len + 1, format, base, size, marker, name); |
166 ASSERT(out_file_ != NULL); | 175 ASSERT(out_file_ != NULL); |
167 (*file_write)(buffer, len, out_file_); | 176 { |
| 177 MutexLocker ml(CodeObservers::mutex()); |
| 178 (*file_write)(buffer, len, out_file_); |
| 179 } |
168 } | 180 } |
169 | 181 |
170 private: | 182 private: |
171 void* out_file_; | 183 void* out_file_; |
172 | 184 |
173 DISALLOW_COPY_AND_ASSIGN(PerfCodeObserver); | 185 DISALLOW_COPY_AND_ASSIGN(PerfCodeObserver); |
174 }; | 186 }; |
175 | 187 |
176 class PprofCodeObserver : public CodeObserver { | 188 class PprofCodeObserver : public CodeObserver { |
177 public: | 189 public: |
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197 } | 209 } |
198 const char* filename = FLAG_generate_pprof_symbols; | 210 const char* filename = FLAG_generate_pprof_symbols; |
199 void* out_file = (*file_open)(filename, true); | 211 void* out_file = (*file_open)(filename, true); |
200 ASSERT(out_file != NULL); | 212 ASSERT(out_file != NULL); |
201 DebugInfo::ByteBuffer* debug_region = new DebugInfo::ByteBuffer(); | 213 DebugInfo::ByteBuffer* debug_region = new DebugInfo::ByteBuffer(); |
202 ASSERT(debug_region != NULL); | 214 ASSERT(debug_region != NULL); |
203 pprof_symbol_generator_->WriteToMemory(debug_region); | 215 pprof_symbol_generator_->WriteToMemory(debug_region); |
204 int buffer_size = debug_region->size(); | 216 int buffer_size = debug_region->size(); |
205 void* buffer = debug_region->data(); | 217 void* buffer = debug_region->data(); |
206 if (buffer_size > 0) { | 218 if (buffer_size > 0) { |
| 219 MutexLocker ml(CodeObservers::mutex()); |
207 ASSERT(buffer != NULL); | 220 ASSERT(buffer != NULL); |
208 (*file_write)(buffer, buffer_size, out_file); | 221 (*file_write)(buffer, buffer_size, out_file); |
209 } | 222 } |
210 delete debug_region; | 223 delete debug_region; |
211 (*file_close)(out_file); | 224 (*file_close)(out_file); |
212 DebugInfo::UnregisterAllSections(); | 225 DebugInfo::UnregisterAllSections(); |
213 } | 226 } |
214 | 227 |
215 virtual bool IsActive() const { | 228 virtual bool IsActive() const { |
216 return FLAG_generate_pprof_symbols != NULL; | 229 return FLAG_generate_pprof_symbols != NULL; |
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262 } else { | 275 } else { |
263 DebugInfo::RegisterSection(name, base, size); | 276 DebugInfo::RegisterSection(name, base, size); |
264 } | 277 } |
265 } | 278 } |
266 | 279 |
267 private: | 280 private: |
268 DISALLOW_COPY_AND_ASSIGN(GdbCodeObserver); | 281 DISALLOW_COPY_AND_ASSIGN(GdbCodeObserver); |
269 }; | 282 }; |
270 | 283 |
271 | 284 |
| 285 #define CLOCKFD 3 |
| 286 #define FD_TO_CLOCKID(fd) ((~(clockid_t) (fd) << 3) | CLOCKFD) // NOLINT |
| 287 |
| 288 class JitdumpCodeObserver : public CodeObserver { |
| 289 public: |
| 290 JitdumpCodeObserver() { |
| 291 ASSERT(FLAG_generate_perf_jitdump); |
| 292 out_file_ = NULL; |
| 293 clock_fd_ = -1; |
| 294 clock_id_ = kInvalidClockId; |
| 295 code_sequence_ = 0; |
| 296 Dart_FileOpenCallback file_open = Isolate::file_open_callback(); |
| 297 Dart_FileWriteCallback file_write = Isolate::file_write_callback(); |
| 298 Dart_FileCloseCallback file_close = Isolate::file_close_callback(); |
| 299 if ((file_open == NULL) || (file_write == NULL) || (file_close == NULL)) { |
| 300 return; |
| 301 } |
| 302 // The Jitdump code observer writes all jitted code into |
| 303 // /tmp/jit-<pid>.dump, we open the file once on initialization and close |
| 304 // it when the VM is going down. |
| 305 { |
| 306 // Open the file. |
| 307 const char* format = "/tmp/jit-%" Pd ".dump"; |
| 308 intptr_t pid = getpid(); |
| 309 intptr_t len = OS::SNPrint(NULL, 0, format, pid); |
| 310 char* filename = new char[len + 1]; |
| 311 OS::SNPrint(filename, len + 1, format, pid); |
| 312 out_file_ = (*file_open)(filename, true); |
| 313 ASSERT(out_file_ != NULL); |
| 314 // Write the jit dump header. |
| 315 WriteHeader(); |
| 316 } |
| 317 // perf uses an internal clock and because our output is merged with data |
| 318 // collected by perf our timestamps must be consistent. Using |
| 319 // the posix-clock-module (/dev/trace_clock) as our time source ensures |
| 320 // we are consistent with the perf timestamps. |
| 321 clock_id_ = kInvalidClockId; |
| 322 clock_fd_ = open("/dev/trace_clock", O_RDONLY); |
| 323 if (clock_fd_ >= 0) { |
| 324 clock_id_ = FD_TO_CLOCKID(clock_fd_); |
| 325 } |
| 326 } |
| 327 |
| 328 ~JitdumpCodeObserver() { |
| 329 Dart_FileCloseCallback file_close = Isolate::file_close_callback(); |
| 330 if (file_close == NULL) { |
| 331 return; |
| 332 } |
| 333 ASSERT(out_file_ != NULL); |
| 334 (*file_close)(out_file_); |
| 335 if (clock_fd_ >= 0) { |
| 336 close(clock_fd_); |
| 337 } |
| 338 } |
| 339 |
| 340 virtual bool IsActive() const { |
| 341 return FLAG_generate_perf_jitdump && (out_file_ != NULL); |
| 342 } |
| 343 |
| 344 virtual void Notify(const char* name, |
| 345 uword base, |
| 346 uword prologue_offset, |
| 347 uword size, |
| 348 bool optimized) { |
| 349 WriteCodeLoad(name, base, prologue_offset, size, optimized); |
| 350 } |
| 351 |
| 352 private: |
| 353 static const uint32_t kJitHeaderMagic = 0x4F74496A; |
| 354 static const uint32_t kJitHeaderVersion = 0x2; |
| 355 static const uint32_t kElfMachIA32 = 3; |
| 356 static const uint32_t kElfMachX64 = 62; |
| 357 static const uint32_t kElfMachARM = 40; |
| 358 static const uint32_t kElfMachMIPS = 10; |
| 359 static const int kInvalidClockId = -1; |
| 360 |
| 361 struct jitheader { |
| 362 uint32_t magic; |
| 363 uint32_t version; |
| 364 uint32_t total_size; |
| 365 uint32_t elf_mach; |
| 366 uint32_t pad1; |
| 367 uint32_t pid; |
| 368 uint64_t timestamp; |
| 369 }; |
| 370 |
| 371 enum jit_record_type { |
| 372 JIT_CODE_LOAD = 0, |
| 373 /* JIT_CODE_UNLOAD = 1, */ |
| 374 /* JIT_CODE_CLOSE = 2, */ |
| 375 /* JIT_CODE_DEBUG_INFO = 3, */ |
| 376 JIT_CODE_MAX = 4, |
| 377 }; |
| 378 |
| 379 struct jr_code_load { |
| 380 uint32_t id; |
| 381 uint32_t total_size; |
| 382 uint64_t timestamp; |
| 383 uint32_t pid; |
| 384 uint32_t tid; |
| 385 uint64_t vma; |
| 386 uint64_t code_addr; |
| 387 uint32_t code_size; |
| 388 uint64_t code_index; |
| 389 uint32_t align; |
| 390 }; |
| 391 |
| 392 const char* GenerateCodeName(const char* name, bool optimized) { |
| 393 const char* format = "%s%s"; |
| 394 const char* marker = optimized ? "*" : ""; |
| 395 intptr_t len = OS::SNPrint(NULL, 0, format, marker, name); |
| 396 char* buffer = Isolate::Current()->current_zone()->Alloc<char>(len + 1); |
| 397 OS::SNPrint(buffer, len + 1, format, marker, name); |
| 398 return buffer; |
| 399 } |
| 400 |
| 401 uint32_t GetElfMach() { |
| 402 #if defined(TARGET_ARCH_IA32) |
| 403 return kElfMachIA32; |
| 404 #elif defined(TARGET_ARCH_X64) |
| 405 return kElfMachX64; |
| 406 #elif defined(TARGET_ARCH_ARM) |
| 407 return kElfMachARM; |
| 408 #elif defined(TARGET_ARCH_MIPS) |
| 409 return kElfMachMIPS; |
| 410 #else |
| 411 #error Unknown architecture. |
| 412 #endif |
| 413 } |
| 414 |
| 415 pid_t gettid() { |
| 416 // libc doesn't wrap the Linux-specific gettid system call. |
| 417 // Note that this thread id is not the same as the posix thread id. |
| 418 return syscall(SYS_gettid); |
| 419 } |
| 420 |
| 421 uint64_t GetKernelTimeNanos() { |
| 422 if (clock_id_ != kInvalidClockId) { |
| 423 struct timespec ts; |
| 424 int r = clock_gettime(clock_id_, &ts); |
| 425 ASSERT(r == 0); |
| 426 uint64_t nanos = static_cast<uint64_t>(ts.tv_sec) * |
| 427 static_cast<uint64_t>(kNanosecondsPerSecond); |
| 428 nanos += static_cast<uint64_t>(ts.tv_nsec); |
| 429 return nanos; |
| 430 } else { |
| 431 return OS::GetCurrentTimeMicros() * kNanosecondsPerMicrosecond; |
| 432 } |
| 433 } |
| 434 |
| 435 void WriteHeader() { |
| 436 Dart_FileWriteCallback file_write = Isolate::file_write_callback(); |
| 437 ASSERT(file_write != NULL); |
| 438 ASSERT(out_file_ != NULL); |
| 439 jitheader header; |
| 440 header.magic = kJitHeaderMagic; |
| 441 header.version = kJitHeaderVersion; |
| 442 header.total_size = sizeof(jitheader); |
| 443 header.pad1 = 0xdeadbeef; |
| 444 header.elf_mach = GetElfMach(); |
| 445 header.pid = getpid(); |
| 446 header.timestamp = GetKernelTimeNanos(); |
| 447 { |
| 448 MutexLocker ml(CodeObservers::mutex()); |
| 449 (*file_write)(&header, sizeof(header), out_file_); |
| 450 } |
| 451 } |
| 452 |
| 453 void WriteCodeLoad(const char* name, uword base, uword prologue_offset, |
| 454 uword code_size, bool optimized) { |
| 455 Dart_FileWriteCallback file_write = Isolate::file_write_callback(); |
| 456 ASSERT(file_write != NULL); |
| 457 ASSERT(out_file_ != NULL); |
| 458 |
| 459 const char* code_name = GenerateCodeName(name, optimized); |
| 460 const intptr_t code_name_size = strlen(code_name) + 1; |
| 461 uint8_t* code_pointer = reinterpret_cast<uint8_t*>(base); |
| 462 |
| 463 jr_code_load code_load; |
| 464 code_load.id = JIT_CODE_LOAD; |
| 465 code_load.total_size = sizeof(code_load) + code_name_size + code_size; |
| 466 code_load.timestamp = GetKernelTimeNanos(); |
| 467 code_load.pid = getpid(); |
| 468 code_load.tid = gettid(); |
| 469 code_load.vma = 0x0; // Our addresses are absolute. |
| 470 code_load.code_addr = base; |
| 471 code_load.code_size = code_size; |
| 472 code_load.align = OS::PreferredCodeAlignment(); |
| 473 |
| 474 { |
| 475 MutexLocker ml(CodeObservers::mutex()); |
| 476 // Set this field under the index. |
| 477 code_load.code_index = code_sequence_++; |
| 478 // Write structures. |
| 479 (*file_write)(&code_load, sizeof(code_load), out_file_); |
| 480 (*file_write)(code_name, code_name_size, out_file_); |
| 481 (*file_write)(code_pointer, code_size, out_file_); |
| 482 } |
| 483 } |
| 484 |
| 485 void* out_file_; |
| 486 int clock_fd_; |
| 487 int clock_id_; |
| 488 uint64_t code_sequence_; |
| 489 DISALLOW_COPY_AND_ASSIGN(JitdumpCodeObserver); |
| 490 }; |
| 491 |
| 492 |
272 const char* OS::Name() { | 493 const char* OS::Name() { |
273 return "linux"; | 494 return "linux"; |
274 } | 495 } |
275 | 496 |
276 | 497 |
277 intptr_t OS::ProcessId() { | 498 intptr_t OS::ProcessId() { |
278 return static_cast<intptr_t>(getpid()); | 499 return static_cast<intptr_t>(getpid()); |
279 } | 500 } |
280 | 501 |
281 | 502 |
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505 } | 726 } |
506 if (FLAG_generate_perf_events_symbols) { | 727 if (FLAG_generate_perf_events_symbols) { |
507 CodeObservers::Register(new PerfCodeObserver); | 728 CodeObservers::Register(new PerfCodeObserver); |
508 } | 729 } |
509 if (FLAG_generate_gdb_symbols) { | 730 if (FLAG_generate_gdb_symbols) { |
510 CodeObservers::Register(new GdbCodeObserver); | 731 CodeObservers::Register(new GdbCodeObserver); |
511 } | 732 } |
512 if (FLAG_generate_pprof_symbols != NULL) { | 733 if (FLAG_generate_pprof_symbols != NULL) { |
513 CodeObservers::Register(new PprofCodeObserver); | 734 CodeObservers::Register(new PprofCodeObserver); |
514 } | 735 } |
| 736 if (FLAG_generate_perf_jitdump) { |
| 737 CodeObservers::Register(new JitdumpCodeObserver); |
| 738 } |
515 #if defined(DART_VTUNE_SUPPORT) | 739 #if defined(DART_VTUNE_SUPPORT) |
516 CodeObservers::Register(new VTuneCodeObserver); | 740 CodeObservers::Register(new VTuneCodeObserver); |
517 #endif | 741 #endif |
518 } | 742 } |
519 | 743 |
520 | 744 |
521 void OS::PrintErr(const char* format, ...) { | 745 void OS::PrintErr(const char* format, ...) { |
522 va_list args; | 746 va_list args; |
523 va_start(args, format); | 747 va_start(args, format); |
524 VFPrint(stderr, format, args); | 748 VFPrint(stderr, format, args); |
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545 } | 769 } |
546 | 770 |
547 | 771 |
548 void OS::Exit(int code) { | 772 void OS::Exit(int code) { |
549 exit(code); | 773 exit(code); |
550 } | 774 } |
551 | 775 |
552 } // namespace dart | 776 } // namespace dart |
553 | 777 |
554 #endif // defined(TARGET_OS_LINUX) | 778 #endif // defined(TARGET_OS_LINUX) |
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